mdw@git.distorted.org.uk Git - disorder/blob - lib/asprintf.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2004-2008 Richard Kettlewell
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file lib/asprintf.c @brief printf() workalikes */
  19
  20 #include "common.h"
  21
  22 #include <stdarg.h>
  23 #include <stddef.h>
  24 #include <errno.h>
  25
  26 #include "printf.h"
  27 #include "sink.h"
  28 #include "mem.h"
  29 #include "vector.h"
  30 #include "log.h"
  31
  32 /** @brief vasprintf() workalike without encoding errors
  33  *
  34  * This acts like vasprintf() except that it does not throw an error
  35  * if you use a string outside the current locale's encoding rules,
  36  * and it uses the memory allocation calls from @ref mem.h.
  37  */
  38 int byte_vasprintf(char **ptrp,
  39                    const char *fmt,
  40                    va_list ap) {
  41   struct dynstr d;
  42   int n;
  43
  44   dynstr_init(&d);
  45   if((n = byte_vsinkprintf(sink_dynstr(&d), fmt, ap)) >= 0) {
  46     dynstr_terminate(&d);
  47     *ptrp = d.vec;
  48   }
  49   return n;
  50 }
  51
  52 /** @brief asprintf() workalike without encoding errors
  53  *
  54  * This acts like asprintf() except that it does not throw an error
  55  * if you use a string outside the current locale's encoding rules,
  56  * and it uses the memory allocation calls from @ref mem.h.
  57  */
  58 int byte_asprintf(char **ptrp,
  59                   const char *fmt,
  60                   ...) {
  61   int n;
  62   va_list ap;
  63
  64   va_start(ap, fmt);
  65   n = byte_vasprintf(ptrp, fmt, ap);
  66   va_end(ap);
  67   return n;
  68 }
  69
  70 /** @brief asprintf() workalike without encoding errors
  71  *
  72  * This acts like asprintf() except that it does not throw an error if
  73  * you use a string outside the current locale's encoding rules; it
  74  * uses the memory allocation calls from @ref mem.h; and it terminates
  75  * the program on error.
  76  */
  77 int byte_xasprintf(char **ptrp,
  78                    const char *fmt,
  79                    ...) {
  80   int n;
  81   va_list ap;
  82
  83   va_start(ap, fmt);
  84   n = byte_xvasprintf(ptrp, fmt, ap);
  85   va_end(ap);
  86   return n;
  87 }
  88
  89 /** @brief vasprintf() workalike without encoding errors
  90  *
  91  * This acts like vasprintf() except that it does not throw an error
  92  * if you use a string outside the current locale's encoding rules; it
  93  * uses the memory allocation calls from @ref mem.h; and it terminates
  94  * the program on error.
  95  */
  96 int byte_xvasprintf(char **ptrp,
  97                     const char *fmt,
  98                     va_list ap) {
  99   int n;
 100
 101   if((n = byte_vasprintf(ptrp, fmt, ap)) < 0)
 102     fatal(errno, "error calling byte_vasprintf");
 103   return n;
 104 }
 105
 106 /*
 107 Local Variables:
 108 c-basic-offset:2
 109 comment-column:40
 110 End:
 111 */